license: move from debian/copyright to LICENSE.txt

Create LICENSE.txt by calling

devtools/update-license-file.sh

which merges LICENSE.template and core/LICENSE.
core/LICENSE covers the code in core/
and stays unchanged, at it has been setup with legal help.

Before there has been a mechanism to update debian/copyright.
Now debian/copyright is just a link to LICENSE.txt,
which is formated according to
https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Co-authored-by: Bruno Friedmann @bareos <89836284+bruno-at-bareos@users.noreply.github.com>

core/platforms/packaging/bareos.spec

@@ -1340,7 +1340,8 @@ mkdir -p %{?buildroot}/%{_libdir}/bareos/plugins/vmware_plugin
 %{_mandir}/man8/btraceback.8.gz
 %attr(0770, %{daemon_user}, %{daemon_group}) %dir %{working_dir}
 %attr(0775, %{daemon_user}, %{daemon_group}) %dir /var/log/%{name}
-%doc core/AGPL-3.0.txt core/LICENSE core/README.* debian/copyright
+%license AGPL-3.0.txt LICENSE.txt  
+%doc core/README.*
 #TODO: cmake does not create build directory
 #doc build/
 

debian/bareos-common.docs

@@ -1,3 +1,2 @@
-core/AGPL-3.0.txt
-core/LICENSE
+AGPL-3.0.txt
 core/README.*

debian/copyright

@@ -0,0 +1 @@
+../LICENSE.txt

devtools/update-license-file.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+#   BAREOS® - Backup Archiving REcovery Open Sourced
+#
+#   Copyright (C) 2024-2024 Bareos GmbH & Co. KG
+#
+#   This program is Free Software; you can redistribute it and/or
+#   modify it under the terms of version three of the GNU Affero General Public
+#   License as published by the Free Software Foundation and included
+#   in the file LICENSE.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#   Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program; if not, write to the Free Software
+#   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+#   02110-1301, USA.
+
+set -e
+set -u
+set -o pipefail
+
+YEAR=$(date +"%Y")
+PROJECT_SOURCE_DIR="$(dirname "$0")/.."
+LICENSE_TEMPLATE="${PROJECT_SOURCE_DIR}/LICENSE.template"
+LICENSE_FILE="${PROJECT_SOURCE_DIR}/LICENSE.txt"
+
+echo "Updating file $LICENSE_FILE from template."
+
+# replace empty lines by "    .":
+#sed -i -z -r -e 's/\n[[:space:]]*\n    /\n    .\n    /g' LICENSE.template
+
+# replace ${YEAR} by current year
+# and handle @include statements
+
+true > "${LICENSE_FILE}"
+sed "s/\${YEAR}/${YEAR}/g" < "${LICENSE_TEMPLATE}" | while IFS= read -r line; do
+    if grep -q '^@include("' <<< "${line}"; then
+        include_file=$(sed -n 's/@include("\(.*\)")/\1/p' <<< "${line}")
+        sed -r -e 's/^[[:space:]]*$/./' -e 's/^(.*)$/    \1/' "${PROJECT_SOURCE_DIR}/${include_file}" >> "${LICENSE_FILE}"
+    else
+        echo "${line}" >> "${LICENSE_FILE}"
+    fi
+done

third-party/README.md

@@ -8,7 +8,8 @@ Each Library will be put into its own subdirectory with `git subtree` and will h
 
 A typical git subtree command would look like this : `git subtree add --prefix destination/path https://www.yourgithost.com/your/repo yourbranch(usuallymaster) --squash`
 
-Make sure the library license is covert by `core/LICENSE`. At best, the library is also licensed as AGPL-3. If it is not already covered, a section needs to be added for it in `core/LICENSE` and `debian/copyright.footer`. Also execute `cd debian; make copyright` to update `debian/copyright`.
+Make sure the library license is covert by `LICENSE.txt`. At best, the library is also licensed as AGPL-3. If it is not already covered, a section needs to be added for it in `LICENSE.template`.
+Also execute `devtools/update-license-file.sh` to update `LICENSE.txt`, and commit new version.
 
 ### What to add?